General Considerations
This lecture will cover medications
commonly taken by sleep lab patients
that are known to have effects on
sleep
The purpose of this lecture is not to
memorize the generic and trade
name of every medication our
patients may ever take!
General Considerations
Medication classes that will be covered:
Sedatives and hypnotics
Stimulants
Psychiatric medications
Pain medications
Antiepileptics
RLS/PLMD medications
Cardiovascular medications
Respiratory medications
Cold medications and antihistamines
Recreational drugs
General Considerations
3.1 billion prescriptions were written in
2002 in the US alone
Nearly half of all Americans are currently
prescribed at least one medication
Most patients seen at the sleep lab are
under the influence of prescribed
medications
It’s important to know and understand
patients’ medication lists (even OTC drugs)
to correctly read and score studies, and also
for the sake of safety
General Considerations
584 prescription and OTC drugs list
sleepiness as a side effect
Of the 20 most commonly
prescribed medications in the US,
at least half are known to affect
sleep
20 most commonly prescribed
brand-name medications
20 most commonly prescribed
generic medications
General Considerations
The effects many medications have on
sleep are largely unknown
Even highly controlled studies have
produced differing results
Several factors limit the understanding
of how different medications affect sleep
and wakefulness:
Limited research
Inconsistent findings
Population differences
Acute vs. chronic effects
General Considerations
The more medications a patient is on,
the higher the chance of clinically
significant interactions
Physicians should always be aware of a
patient’s medications and instruct the
patient and tech as to their use before
and during the PSG
Any changes to a patient’s regular
medication routine should be clearly
indicated on the study order or history
General Considerations
Abbreviations:
SOL – sleep onset latency
○Some charts will use “SL” instead
ROL – REM onset latency
○Some charts will use “RL” instead
TST – total sleep time
SWS – slow-wave sleep
WASO – wake after sleep onset
EDS – excessive daytime sleepiness
I will try to give both generic and trade
names
Trade names will always be capitalized
Sedatives and Hypnotics
Sedatives are prescribed to treat
anxiety, and hypnotics are prescribed to
treat insomnia
Nearly identical in how they function and are
often used interchangeably
Have a history of limited efficacy,
serious side effects, addiction, and lethal
toxicity in overdose
Long-term use can lead to tolerance and
actually cause insomnia
Sedatives and Hypnotics
All classes bind to GABA receptors in
the brain, inhibiting internal and external
influences from disrupting sleep
Basically “protect” sleep from things such as
worries, noise, and pain
Treating OSA-induced EDS with sedatives
can decrease respiratory drive and increase
prevalence of OSA, actually worsening
sleep
Beware that the effects of multiple
sedatives may be more than additive
Sedatives and Hypnotics
3 main categories of hypnotics:
Barbiturates
Benzodiazepines
Non-benzodiazepines
Barbiturates
Widely used until the 1960s, but were
often abused and had a high danger of
overdose
Examples:
Trade name Generic name
Luminal phenobarbital
Nembutal pentobarbital
Quaalude, Sopor methaqualone
Doriden glutethimide
Placidyl ethchlorvynol
Nodudor methyprylon
Barbiturates
Biggest effect seen on sleep is that they’re
very sedating
Increase TST, decrease REM, increase
spindle frequency and density, increase
SWS
Phenobarbital (Luminal) may actually suppress
SWS
Can decrease respiratory drive and
increase prevalence of OSA
May exacerbate respiratory failure in
patients with COPD, CSA, or restrictive
lung disease
Benzodiazepines
Became available in the 1970s, and have less
overdose and abuse potential than
barbiturates
Bind to a broad range of GABA receptors and
have a widespread sedating effect
Examples:
Trade name Generic name
Ativan lorazepam
Klonopin clonazepam
Dalmare flurazepam
Valium diazepam
Xanax alprazolam
Halcion triazolam
Tranzene clorazepate
Benzodiazepines
Tend to lose efficacy with prolonged use
Decrease WASO, increase TST,
increase stages N1 and N2, increase
spindle frequency/density, decrease
SWS, decrease REM
Clonazepam (Klonopin) may actually
increase SWS
Are also sometimes used to treat PLMD
Clonazepam (Klonopin) is also used to
treat REM behavior disorder
Benzodiazepines
Have similar respiratory effects as
barbiturates:
Can cause respiratory depression, causing or
worsening OSA
Can exacerbate respiratory failure in patients with
COPD, CSA, or restrictive lung disease
Withdrawal can cause REM rebound
Flurazepam (Dalmare), diazepam (Valium),
and clorazepate (Tranzene) have almost 11
day half-lives
Effects may be seen long after being discontinued
Non-benzodiazepines
Bind preferentially to GABA
A
receptors
and have a less widespread effect than
benzodiazepines
Examples:
Trade name Generic name
Ambien zolpidem
Benadryl diphenhydramine (also an
antihistamine)
Sonata zaleplon
Lunesta eszopiclone
Rozerem ramelteon
BuSpar buspirone
Non-benzodiazepines
Have a relatively short half-life, and have the
fewest side effects of all hypnotics
Buspirone (BuSpar) in particular has been studied
and found to have no effects on sleep architecture or
daytime alertness
Zolpidem (Ambien) and eszopiclone (Lunesta)
have greatest sleep-inducing efficacy, but
zaleplon (Sonata) has fewest side effects
Zaleplon (Sonata) may increase ROL and SWS
Conflicting studies have shown that zolpidem
(Ambien) can either suppress or increase SWS
No REM rebound occurs after discontinuing
Stimulants
Increase CNS activation to promote
alertness
Used to treat narcolepsy,
hypersomnia, ADHD, obesity, and
even the common cold
Many of the same medications are
used to treat both narcolepsy and
ADHD
Stimulants
Trade name Generic name
Provigil Modafinil
Nuvigil Armodafinil
Strattera atomexetine
Adderall amphetamine
Dexedrine dextroamphetamine
Desoxyn methamphetamine
Concerta, Ritalinmethylphenidate
Trade name Generic name
Didrex benzphetamine
Desoxyn methamphetamine
Adipex phentermine
Meridia sibutramine
Example narcolepsy/hypersomnia/
ADHD medications:
Example appetite suppressants:
Stimulants
Most have high potential for abuse and
can cause personality changes, tremor,
hypertension, headaches, and GERD
Newer stimulants modafinil (Provigil)
and armodafinil (Nuvigil) are distinct
from the amphetamines and have a
much lower abuse potential
Now usually the first route of treatment for
narcolepsy
Stimulants
Any medications that increase
alertness have the risk of causing
insomnia
Increase SOL, ROL, WASO,
arousals, and stages N1 and N2
Decrease SWS, REM, and TST
Stimulants
Common dose-dependent side effects
may also interfere with sleep:
Anxiety
Headache
Irritability
Heart palpitations
Tremors
Sudden withdrawal from any stimulant
substance may cause profound
sleepiness
Beware of how stimulant withdrawal may
affect MSLTs
Antidepressants
Four main classes:
SSRIs and SNRIs
Tricyclics
MAOIs
Atypical antidepressants
Each class affects neurotransmitters in
different ways
Each has its own set of side effects,
which range from stimulating to sedating
Antidepressants
Most antidepressants affect the
neurotransmitters norepinephrine,
serotonin, acetylcholine, and dopamine
All are known to play an important role in the
sleep-wake cycle
15% of those who take antidepressants
report disrupted sleep or daytime fatigue
Many are sedating, but stopping them prior
to a PSG is not always practical or safe
Almost all classes have been known to
exacerbate PLMD
SSRIs and SNRIs
Selective serotonin reuptake inhibitors
affect the neurotransmitter serotonin
SNRIs affect both serotonin and
norepinephrine, and have similar sleep
effects to SSRIs
Trade name Generic name
Prozac fluoxetine
Zoloft sertraline
Celexa citalopram
Lexapro escitalopram
Paxil paroxetine
Luvox fluvoxamine
Trade name Generic name
Cymbalta duloxetine
Effexor venlafaxine
Example SSRIs: Example SNRIs:
SSRIs and SNRIs
Generally have the mildest side effects of
all antidepressants
SSRIs tend to be stimulating, and can
cause mild-moderate insomnia
Fluoxetine (Prozac) is the most sleep-disruptive
Can also cause drowsiness in some
individuals
Mostly seen with paroxetine (Paxil) and
fluvoxamine (Luvox)
Decrease TST, increase WASO, decrease
REM, and increase PLMD
Fluoxetine (Prozac) can also decrease SWS
SSRIs and SNRIs
Tend to be respiratory stimulants and
can improve OSA
Can cause SEMs to occur during most
of the night, even long after cessation of
drug use
Most prevalent with fluoxetine (Prozac),
paroxetine (Paxil), and sertraline (Zoloft)
Less prevalent with citalopram (Celexa) and
escitalopram (Lexapro)
“Prozac eyes” are often so rapid that they
can easily be mistaken for REMs.
SSRIs and SNRIs
MSLT of a patient taking 20mg
fluoxetine daily (30 seconds)
SSRIs and SNRIs
Same patient and epoch (120 seconds)
SSRIs and SNRIs
Most increase ROL and decrease REM by
about 30%
Knowing this is important for correct interpretation
REM suppression was once believed to be
an important part of treatment
Because of their stimulating effects, SSRIs
and SNRIs can worsen REM behavior
disorder
Despite the sleep disruption caused by these
drugs, patients report sleeping better
subjectively
Tricyclics
Have a broader effect on neurotransmitters
Alter norepinephrine, histamine, and
acetylcholine activity
Examples:
Trade name Generic name
Elavil amitriptyline
Norpramin desipramine
Pamelor nortriptyline
Sinequan doxepin
Tofranil imipramine
Vivactil protriptyline
Tricyclics
Mildly-moderately sedating
Improve sleep but cause EDS
Protriptyline (Vivactil) less sedating
than others
Increase TST, decrease WASO,
increase SWS, decrease REM, and
increase PLMD
MAOIs
Monoamine oxidase inhibitors are the
oldest antidepressants, and have
greatest effects on sleep
Examples:
Trade name Generic name
Marplan isocarboxazid
Nardil phenelzine
Parnate tranylcypromine
MAOIs
Tend to be sedating, but can also
cause insomnia
Suppress REM, but effect is more
sustained than with SSRIs
Cause increased WASO,
decreased TST, and markedly
reduced REM
Atypical Antidepressants
Work through a variety of mechanisms
and affect multiple neurotransmitters, so
effects on sleep are less known
Examples:
Trade name Generic name
Desyrel trazodone
Serzone nefazodone
Remeron mirtazapine
Wellbutrin bupropion
Atypical Antidepressants
Trazodone (Desyrel) and nefazodone
(Serzone) are considered serotonin
antagonist and reuptake inhibitors
Can cause EDS, but may improve sleep
Increase TST and SWS
Conflicting results on REM effects
Mirtazapine (Remeron) is a
norepinephrine and specific serotonin
antagonist
Also causes sedation and EDS but
enhances sleep
Increases TST, decreases SOL
Atypical Antidepressants
Bupropion (Wellbutrin), as well as the
tricyclic protryiptiline (Vivactil), are
norepinephrine and dopamine reuptake
inhibitors
Most alerting of antidepressants, and can
cause insomnia
Actually increase REM and don’t exacerbate
PLMD
St. John’s Wort is an herb taken by
some for depression
Has been shown to increase SWS
Antidepressants
Antipsychotics
Lithium has traditionally been the drug of
choice for treating bipolar disorder
Trade names include Cibalith, Eskalith,
Lithane, and Lithobid
The seizure medication divalproex
(Depakote) is also prescribed to treat the
manic phase of bipolar disorder
Tends to be sedating, causing EDS but
improving sleep
Reduces REM, increases SWS and the
prevalence of arousal disorders such as
night terrors and somnambulism
Antipsychotics
Common antipsychotics which are prescribed
for schizophrenia, other psychoses, and
occasionally bipolar disorder:
Characterized mainly by their sedative effect
Chlorpromazine (Thorazine) can cause an increase
in SWS; diffuse, slower activity in the EEG; and a
decrease in spindle activity
Trade name Generic name
Thorazine chlorpromazine
Haldol haloperidol
Mellaril thioridazine
Risperdal risperidone
Seroquel quetiapine
Zyprexa olanzapine
Chantix
Smoking cessation aid that works by
blocking nicotine receptors in the brain
Makes smoking have less of a pleasurable
effect
Known to cause insomnia and vivid,
unusual dreams
Watch for symptoms of stimulant
withdrawal
Pain Medications
Many prescription pain medications are
either narcotics or barbiturates
Are often VERY sedating
Examples:
Trade name Generic name
Vicodin, Lortab hydrocodone
Darvocet propoxyphrene
Demerol meperidine
Methadone methadone
Percocet oxycodone
Norgesic orphenadrine
--- morphine
--- codeine
Pain Medications
Decrease SOL and WASO, increase TST, may
decrease SWS and REM
May decrease alpha, and can cause slower,
diffuse EEG
Can depress respiratory system and increase
severity of OSA
Have been known to cause confusion in elderly
patients
Aspirin (ASA or acetylsalicylic acid) in an
NSAID taken for pain or to prevent heart attack
Main effect on sleep is a decrease in SWS
Antiepileptic and Neuromuscular
Medications
Prescribed to treat epileptic seizures as
well as muscle pain caused by injury
Include both muscle relaxants and
anticonvulsants
Example muscle relaxants:
Trade name Generic name
Flexeril cyclobenzaprine
Soma carisoprodol
Antiepileptic and Neuromuscular
Medications
Example anticonvulsants:
Topiramate (Topamax) is also prescribed to
treat migraine headaches
Divalproex (Depakote) is also prescribed for
bipolar disorder
Trade name Generic name
Depakote divalproex
Dilantin phenytoin
Neurontin gabapentin
Tegretol carbamazepine
Topamax topiramate
Keppra levetiracetam
Antiepileptic and Neuromuscular
Medications
Tend to be very sedating
Phenytoin (Dilantin) may increase
SWS, decrease alpha, and cause
diffuse, slower EEG activity
Anticonvulsants also tend to reduce
REM
RLS/PLMD Medications
Restless leg syndrome and periodic limb
movement disorder occur in up to 15%
of the population
Often occur comorbidly
Frequency of RLS/PLMD increases with
age
Historically treated with
benzodiazepines, particularly
clonazepam (Klonopin)
Newer drugs affect mainly dopamine
receptors
RLS/PLMD Medications
Examples:
Carbidopa and levodopa (Sinemet) have
been reported to induce vivid dreams or
nightmares, hallucinations, vocalizations, and
somnambulism
○Rarely used due to the potential for
tachyphylaxis and augmentation of symptoms
Trade name Generic name
Sinemet carbidopa/levodopa
Permax pergolide
Mirapex pramipexole
Requip repinirole
Eldepryl selegiline
RLS/PLMD Medications
Tend to reduce SWS and REM
Conflicting studies have shown levodopa
either increases or decreases REM
Common side effects are nausea and
headache, which may also interfere with
sleep
Usually improve sleep quality and
decrease arousals
Pramipexole (Mirapex) was originally
developed to treat Parkinson’s Disease
May cause sudden attacks of uncontrollable
sleepiness in some individuals
Antihypertensives
Different classes have
different methods of
action, but the desired
effect is to lower blood
pressure
Classes include
diuretics, beta-blockers,
alpha-beta-blockers,
ACE inhibitors, calcium
channel blockers, and
vasodilators
Examples:
Trade name Generic name
Inderal propranolol
Tenormin atenolol
Lopressor metoprolol
--- pindolol
--- reserpine
Catapres clonidine
Coreg carvedilol
Cozaar losartan
Privinil, Zestrillisinopril
Antihypertensives
May suppress REM and increase SWS
Have been reported to cause insomnia,
nightmares, vivid dreams, hallucinations,
vocalizations, somnambulism, and EDS
Most sleep effects seen with clonidine
(Catapres)
Fewest sleep effects seen with atenolol
(Tenormin)
Diuretics
Work by stimulating the kidneys to
excrete more sodium into the urine
This draws excess fluid out of cells so it can
be eliminated from the body
Although mainly prescribed to treat high
blood pressure, are also commonly used
to treat edema caused by heart failure,
kidney disease, or liver cirrhosis
Diuretics
Examples:
The main effect on sleep is excessive
urination, which can cause frequent
nocturnal awakenings
A possible side effect is potassium
deficiency, which can cause nocturnal
cramping of the calf muscles
Trade name Generic name
Bumex bumetanide
Zaroxolyn metolazone
Aquazide, Microzide hydrochlorothiazide (HCTZ)
Lasix furosemide
Hypolipidemics
Work to lower cholesterol by blocking
its production by or absorption into the
body
Along with antihypertensives, are
some of the most common drugs
taken by sleep lab patients
Hypolipidemics
Examples:
No consistent findings on sleep and
wakefulness
Insomnia reported rarely with atorvastatin (Lipitor)
and lovastatin (Mevacor, Altoprev)
Trade name Generic name
Caduet amlodipine/atorvastatin
Vytorin ezetimibe/simvastatin
Zetia ezetimibe
Tricor fenofibrate
Lipitor atorvastatin
Mevacor, Altoprev lovastatin
Pravachol pravastatin
Crestor rosuvastatin
Zocor simvastatin
Antiarrhythmatics
Work by slowing down the heart rate to
treat fast arrhythmias such as atrial
fibrillation, atrial flutter, ventricular
fibrillation, and ventricular tachycardia
Includes a vast array of medications that
work through a variety of mechanisms
How they affect sleep has been largely
inconclusive
Atrial
fibrillation
Antiarrhythmatics
Most common complaint is daytime
fatigue
Most important thing to be aware of
with these drugs is that they
indicate the patient has a
documented history of cardiac
arrhythmias, so be very vigilant!
Respiratory Medications
The most common respiratory
conditions that require long-term
medication are asthma and COPD
Examples:
Theophylline (Aerolate) is chemically related
to caffeine, and doses are usually high
enough to disrupt sleep
Trade name Generic name
Proventil, Ventolin albuterol
Maxair pirbuterol
Aerolate theophylline
--- aminophylline
Atrovent ipratropium
Respiratory Medications
Work by stimulating the central nervous
system, which can cause insomnia,
especially if taken shortly before
bedtime
Corticosteroids like prednisone are
prescribed for asthma as well as for joint
pain and inflammation
Can cause jitters and insomnia
Increase appetite and can cause fluid
retention
○Any weight gain can increase the risk of OSA
Decongestants
Work by reducing blood flow to the mucus
membranes so that less mucus is
produced
Examples include oxymetazoline (Afrin),
phenylphrine (Contac-D, Sudafed PE), and
phenylpropanolamine (Phenyldrine), but
most common decongestant is
pseudoephedrine
Pseudoephedrine can be found in:
Actifed, Advil Cold & Sinus, Aleve Cold & Sinus,
DayQuil, NyQuil, Dimetapp, Robitussin, Sudafed,
Triaminic, Tylenol Cold, and most drugs that end in “-D”
Decongestants
Most cause some degree of CNS
stimulation, which may result in
insomnia
Particularly true w/ drugs containing
pseudoephedrine
Pseudoephedrine has been reported to
induce hallucinations, vocalizations, and
somnambulism
Ephedrine in brain = adrenaline in body
Antihistamines
Work by blocking histamine, a
neurotransmitter that’s responsible for
allergy symptoms but that also promotes
wakefulness
Examples:
Trade name Generic name
Zyrtec cetirizine
Astelin azelastine
Benadryl diphenhydramine
Allegra fexofenadine
Claritin, Alavert loratadine
Clarinex desloratadine
Dramamine dimenhydrinate
Antihistamines
Tend to be sedating, and can cause
drowsiness
Diphenhydramine (Benadryl) also used as a
sleep aid
Shorten SOL, decrease REM, decrease
arousals, and increase TST
Newer antihistamines such as cetirizine
(Zyrtec) have fewer side effects
Taking antihistamines before bed can
result in a dry mouth and drowsiness
upon awakening
Cold Medications and
Antihistamines
Many cold medications contain an antihistamine
as well as a decongestant, so side effects may
be unpredictable and can vary greatly from one
patient to the next
Most cold medications
are available OTC, so
they’re readily
accessible to patients
Alcohol
Affects GABA receptors in the brain
Consumed close to bedtime, can
initially be very sedating
At least 25% of insomniacs report
using alcohol as a sleep aid
Those with greater trouble sleeping
are more likely to have diagnosable
alcoholism
Alcohol
In the first half of the night, NREM is
increased and REM is reduced
In the second half of the night,
withdrawal symptoms occur, particularly
in heavy drinkers
Shallow, disrupted sleep; late-night REM
rebound; nightmares; sympathetic nervous
system arousal; tachycardia; sweating
Decreases SOL and REM, increased
WASO (especially in second half of the
night)
Alcohol
Relaxes muscles of the upper
airway
This can cause or worsen snoring and
OSA
Alcoholics often report insomnia,
hypersomnia, circadian rhythm
disturbances, and parasomnias
Recovering alcoholics may have
abnormal sleep patterns for years after
becoming sober
Caffeine
Binds to adenosine receptors
in the brain, blocking the
sleep-inducing neurotransmitter
adenosine from having an effect
Consumption of large amounts may lead
to restlessness, nervousness,
excitement, insomnia, flushed face, and
GI problems
1000mg can produce insomnia, dyspnea,
delirium, and arrhythmias
Doses above 5000mg can be fatal
Caffeine
Because it’s so prevalent,
it’s easy to ingest large
amounts unintentionally.
Caffeine
Chronic daily use leads to tolerance and
dependence
Half-life is 3-7 hours, so even caffeine
consumed in the afternoon can disrupt sleep
at night
Effect more pronounced in children, pregnant
women, the elderly, and people with
hypothyroidism
Increases arousals, decreases TST and SWS
Beware that caffeine is present in many
headache medications (e.g., Excedrin
Migraine)
Nicotine
Approximately 23% of adults in the US use
nicotine products
Conflicting reports on how it affects sleep
May be sedating in lower doses but altering in
higher doses
Also conflicting reports on how it affects REM
Some reports have shown an increase while
others have shown a decrease
Nicotine patches deliver small doses of
nicotine into the bloodstream around the clock
Can cause insomnia and disturbing dreams
Other Recreational Drugs
Marijuana (tetrahydracannibinol)
Effects on sleep very similar to alcohol
May induce sleepiness
Opiates
May induce sleepiness but cause
REM suppression
Can increase SWS and prevalence of
night terrors and somnambulism
Other Recreational Drugs
Amphetamines
Can be useful as prescription
stimulants, but some forms
(particularly methamphetamine) have
a high abuse potential when used as
recreational drugs
Effects tend to be dose-dependent, so
recreational users may have even
more disturbed sleep than those who
take prescription amphetamines as
prescribed
Helpful Hints
Drugs that can cause nightmares or
vivid dreams:
Antihistamines, benzodiazepines, beta-
blockers, dopaminergics, isotretinoin,
ofloxacin, naproxen, thiothixene, verapamil,
varenicline
Drugs that can cause excessive daytime
sleepiness:
Antihistamines, antihypertensives, anti-
nausea agents, dopamine agonists,
antiepileptics
Helpful Hints
Drugs that can
cause insomnia:
Amphetamines,
antiretrovirals, anti-
influenza drugs,
cholesterol-
lowering drugs,
corticosteroids
Helpful Hints
Following are some tips for
recognizing the class of unfamiliar
drugs
Some precautions:
These only work on generic names, as
trademarked drugs are often named
arbitrarily and for marketing purposes
These tips aren’t applicable in all
cases – they’re a general trend, not a
hard and fast rule
Helpful Hints
Generic drug names that: Are usually:
Contain “barb” Barbiturates
End in “-pam” or “-lam” Benzodiazepines
Contain “amphetamine” Amphetamines
End in “-oxetine” or “-pram” SSRI antidepressants
End in “-triptyline” Tricyclic antidepressants
Start or end with “lith” Lithium preparations
End in “-dopa” Dopaminergic Parkinson’s drugs
End in “-lol’ Beta-blockers
Contain “statin" Cholesterol-lowering statins
End in “-buterol” or “-phylline”Respiratory medications
Conclusion
The vast array of substances available
to our patients will continually challenge
our ability to interpret PSGs
As technologists, we must remain aware
of the latest trends in the use and abuse
of various drugs
We must know if and how each PSG
might be affected by a patient’s
medications, including those NOT taken
the night of the study
Questions,Concerns,Feedback
Should you have any questions or
feedback regarding this presentation
please feel free to contact our program
director, Jennifer Brickner-York, at [email protected].
Thank You.
References
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Neubauer, D.N. (2008). Medication effects on sleep.
(2008). ACCP Sleep Medicine Review Board syllabus
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Pandi-Perumal, S.R., Ruoti, R.R., & Kramer, M. (Eds.).
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